Condensed Consolidated Balance Sheets - USD ($)	Jun. 30, 2023	Mar. 31, 2023
Current assets:
Cash and cash equivalents	$ 107,093,000	$ 112,842,000
Accounts receivable, net of allowance for expected credit losses of $578 and $318, respectively	25,581,000	22,378,000
Contract assets	2,283,000	2,242,000
Inventories	8,452,000	9,774,000
Prepaid expenses and other current assets	6,029,000	7,422,000
Total current assets	149,438,000	154,658,000
Property and equipment, net	15,987,000	14,576,000
Operating lease right-of-use assets	24,038,000	12,708,000
Goodwill	33,077,000	32,638,000
Intangible assets, net	17,888,000	18,140,000
Deferred income taxes, non-current	2,927,000	2,790,000
Other non-current assets	7,992,000	7,526,000
Total assets	251,347,000	243,036,000
Accrued liabilities:
Accounts payable	10,544,000	9,418,000
Contract liabilities	47,291,000	52,124,000
Accrued liabilities	11,257,000	13,708,000
Operating lease liabilities, current	4,800,000	3,263,000
Finance lease obligations, current	1,000	2,000
Total current liabilities	73,893,000	78,515,000
Deferred income taxes, non-current	2,303,000	2,257,000
Operating lease liabilities, non-current	24,139,000	13,477,000
Other non-current liabilities	4,326,000	4,018,000
Commitments and contingencies
Shareholders' equity:
Common shares, without par value, at $0.30 stated value; 80,000,000 shares authorized; 31,606,831 shares issued; and 25,351,357 and 25,326,626 shares outstanding at June 30, 2023 and March 31, 2023, respectively	9,482,000	9,482,000
Treasury shares, 6,255,474 and 6,280,205 at June 30, 2023 and March 31, 2023, respectively	(1,877,000)	(1,884,000)
Capital in excess of stated value	53,735,000	52,978,000
Retained earnings	53,853,000	52,764,000
Accumulated other comprehensive loss	(3,507,000)	4,030,000
Total shareholders' equity	111,686,000	109,310,000
Total liabilities and shareholders' equity	251,347,000	243,036,000
Series A Convertible Preferred Stock [Member]
Other non-current liabilities:
Series A convertible preferred stock, no par value	$ 35,000,000	$ 35,459,000